Could not load file or assembly 'WinRTXamlToolkit'

Question

I want to use some charts in my Windows Phone 8.1 application. So, following this tutorial I have done the following:

1. I have installed the following packages:

   

2. I have the following XAML:

   <Page xmlns:Charting="using:WinRTXamlToolkit.Controls.DataVisualization.Charting" 
   x:Class="MST_61462004_E3T02.MainPage"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:local="using:MST_61462004_E3T02"
   xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
   xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
   mc:Ignorable="d"
   Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
   
   <Grid>
   
       <Charting:Chart x:Name="PieChart"
                       HorizontalAlignment="Left"
                       VerticalAlignment="Top"
                       Margin="100,100,0,0"
                       Width="400"
                       Height="400">
           <Charting:PieSeries Margin="0"
                               IndependentValuePath="Name"
                               DependentValuePath="Amount"
                               IsSelectionEnabled="True" />
       </Charting:Chart>
   
   
   </Grid>
   

But I get the following error:

Error 1 Could not load file or assembly 'WinRTXamlToolkit, Version=1.8.1.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

I am using windows runtime blank project.

Could anyone point what is causing the error?

Answer 1

Based on the symptoms - most likely a network issue or nuget/vs bug caused a problem with file missing from the package.

It always helps to try to reproduce a problem.